{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:J3BOXOXXF5SZR4OKRYAYXIN7PG","short_pith_number":"pith:J3BOXOXX","canonical_record":{"source":{"id":"1501.04144","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-01-17T02:23:28Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"13b4cc3c897c2be8aa254ef6b058ee923142711738a6d0271a45795a5d52c94c","abstract_canon_sha256":"d2b47a08ca3aa9b8811c9d51ac9eaba9235f77b302ef7970de0ab2b98d8bdcdb"},"schema_version":"1.0"},"canonical_sha256":"4ec2ebbaf72f6598f1ca8e018ba1bf7994eb8c2af636bbff2354e90364359fb3","source":{"kind":"arxiv","id":"1501.04144","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.04144","created_at":"2026-05-18T02:29:09Z"},{"alias_kind":"arxiv_version","alias_value":"1501.04144v1","created_at":"2026-05-18T02:29:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.04144","created_at":"2026-05-18T02:29:09Z"},{"alias_kind":"pith_short_12","alias_value":"J3BOXOXXF5SZ","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"J3BOXOXXF5SZR4OK","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"J3BOXOXX","created_at":"2026-05-18T12:29:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:J3BOXOXXF5SZR4OKRYAYXIN7PG","target":"record","payload":{"canonical_record":{"source":{"id":"1501.04144","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-01-17T02:23:28Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"13b4cc3c897c2be8aa254ef6b058ee923142711738a6d0271a45795a5d52c94c","abstract_canon_sha256":"d2b47a08ca3aa9b8811c9d51ac9eaba9235f77b302ef7970de0ab2b98d8bdcdb"},"schema_version":"1.0"},"canonical_sha256":"4ec2ebbaf72f6598f1ca8e018ba1bf7994eb8c2af636bbff2354e90364359fb3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:29:09.944029Z","signature_b64":"WPlZkyHZPdcMxwv7XcrDAYC8HhbOWDWVn7Y91OEtUXg75sU8yhkHQzMcMqYb4Q+vaIMg1KCQYx7v3t+MQN5MBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4ec2ebbaf72f6598f1ca8e018ba1bf7994eb8c2af636bbff2354e90364359fb3","last_reissued_at":"2026-05-18T02:29:09.943345Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:29:09.943345Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1501.04144","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:29:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gLieKzREjQKcUNX0Jr9BwrPchLd+Ydc2wLb3JGFN40WujHdTv13x88B2eabT7ExxO05nnEy+3gBko0acNh9lAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T20:16:02.751885Z"},"content_sha256":"0ed918f96362d6ae689b66e8fc3f9f9f9fb7fb9415e05662f1ef969c576ad2c3","schema_version":"1.0","event_id":"sha256:0ed918f96362d6ae689b66e8fc3f9f9f9fb7fb9415e05662f1ef969c576ad2c3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:J3BOXOXXF5SZR4OKRYAYXIN7PG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"First-light LBT nulling interferometric observations: warm exozodiacal dust resolved within a few AU of eta Corvi","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.EP","authors_text":"A. Gaspar, A. J. Skemer, A. J. Weinberger, A. Puglisi, A. Roberge, A. Vaz, B. Mennesson, C. Beichman, C. Haniff, D. Defr\\`ere, E. C. Downey, E. Pinna, E. Serabyn, G. Brusa, G. Bryden, G. M. Kennedy, G. Rieke, J. Lebreton, J. M. Hill, J. M. Leisenring, J. R. Males, K. M. Morzinski, K. Stapeldfeldt, K. Su, L. Marion, M. C. Wyatt, M. Montoya, O. Absil, O. Durney, P. Arbo, P. Grenz, P. M. Hinz, R. Millan-Gabet, R. Sosa, S. Esposito, T. J. McMahon, V. P. Bailey, V. Vaitheeswaran, W. C. Danchi, W. F. Hoffmann","submitted_at":"2015-01-17T02:23:28Z","abstract_excerpt":"We report on the first nulling interferometric observations with the Large Binocular Telescope Interferometer (LBTI), resolving the N' band (9.81 - 12.41 um) emission around the nearby main-sequence star eta Crv (F2V, 1-2 Gyr). The measured source null depth amounts to 4.40% +/- 0.35% over a field-of-view of 140 mas in radius (~2.6\\,AU at the distance of eta Corvi) and shows no significant variation over 35{\\deg} of sky rotation. This relatively low null is unexpected given the total disk to star flux ratio measured by Spitzer/IRS (~23% across the N' band), suggesting that a significant fracti"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.04144","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:29:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qRfXqb361wdc9sPfJEKBVrdrmcQPJcPnJAZySV0MOakRLZ/AfRUqwcoZT1u2V9haFRZLPhdv1/xFt51ppRIpBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T20:16:02.752239Z"},"content_sha256":"f23ba72d61bfdb1551ad054d7621228ac4637cda543e1c5cf8b4d0ec3bfe4942","schema_version":"1.0","event_id":"sha256:f23ba72d61bfdb1551ad054d7621228ac4637cda543e1c5cf8b4d0ec3bfe4942"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/J3BOXOXXF5SZR4OKRYAYXIN7PG/bundle.json","state_url":"https://pith.science/pith/J3BOXOXXF5SZR4OKRYAYXIN7PG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/J3BOXOXXF5SZR4OKRYAYXIN7PG/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-01T20:16:02Z","links":{"resolver":"https://pith.science/pith/J3BOXOXXF5SZR4OKRYAYXIN7PG","bundle":"https://pith.science/pith/J3BOXOXXF5SZR4OKRYAYXIN7PG/bundle.json","state":"https://pith.science/pith/J3BOXOXXF5SZR4OKRYAYXIN7PG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/J3BOXOXXF5SZR4OKRYAYXIN7PG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:J3BOXOXXF5SZR4OKRYAYXIN7PG","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"d2b47a08ca3aa9b8811c9d51ac9eaba9235f77b302ef7970de0ab2b98d8bdcdb","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-01-17T02:23:28Z","title_canon_sha256":"13b4cc3c897c2be8aa254ef6b058ee923142711738a6d0271a45795a5d52c94c"},"schema_version":"1.0","source":{"id":"1501.04144","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.04144","created_at":"2026-05-18T02:29:09Z"},{"alias_kind":"arxiv_version","alias_value":"1501.04144v1","created_at":"2026-05-18T02:29:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.04144","created_at":"2026-05-18T02:29:09Z"},{"alias_kind":"pith_short_12","alias_value":"J3BOXOXXF5SZ","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"J3BOXOXXF5SZR4OK","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"J3BOXOXX","created_at":"2026-05-18T12:29:27Z"}],"graph_snapshots":[{"event_id":"sha256:f23ba72d61bfdb1551ad054d7621228ac4637cda543e1c5cf8b4d0ec3bfe4942","target":"graph","created_at":"2026-05-18T02:29:09Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We report on the first nulling interferometric observations with the Large Binocular Telescope Interferometer (LBTI), resolving the N' band (9.81 - 12.41 um) emission around the nearby main-sequence star eta Crv (F2V, 1-2 Gyr). The measured source null depth amounts to 4.40% +/- 0.35% over a field-of-view of 140 mas in radius (~2.6\\,AU at the distance of eta Corvi) and shows no significant variation over 35{\\deg} of sky rotation. This relatively low null is unexpected given the total disk to star flux ratio measured by Spitzer/IRS (~23% across the N' band), suggesting that a significant fracti","authors_text":"A. Gaspar, A. J. Skemer, A. J. Weinberger, A. Puglisi, A. Roberge, A. Vaz, B. Mennesson, C. Beichman, C. Haniff, D. Defr\\`ere, E. C. Downey, E. Pinna, E. Serabyn, G. Brusa, G. Bryden, G. M. Kennedy, G. Rieke, J. Lebreton, J. M. Hill, J. M. Leisenring, J. R. Males, K. M. Morzinski, K. Stapeldfeldt, K. Su, L. Marion, M. C. Wyatt, M. Montoya, O. Absil, O. Durney, P. Arbo, P. Grenz, P. M. Hinz, R. Millan-Gabet, R. Sosa, S. Esposito, T. J. McMahon, V. P. Bailey, V. Vaitheeswaran, W. C. Danchi, W. F. Hoffmann","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-01-17T02:23:28Z","title":"First-light LBT nulling interferometric observations: warm exozodiacal dust resolved within a few AU of eta Corvi"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.04144","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:0ed918f96362d6ae689b66e8fc3f9f9f9fb7fb9415e05662f1ef969c576ad2c3","target":"record","created_at":"2026-05-18T02:29:09Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"d2b47a08ca3aa9b8811c9d51ac9eaba9235f77b302ef7970de0ab2b98d8bdcdb","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-01-17T02:23:28Z","title_canon_sha256":"13b4cc3c897c2be8aa254ef6b058ee923142711738a6d0271a45795a5d52c94c"},"schema_version":"1.0","source":{"id":"1501.04144","kind":"arxiv","version":1}},"canonical_sha256":"4ec2ebbaf72f6598f1ca8e018ba1bf7994eb8c2af636bbff2354e90364359fb3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4ec2ebbaf72f6598f1ca8e018ba1bf7994eb8c2af636bbff2354e90364359fb3","first_computed_at":"2026-05-18T02:29:09.943345Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:29:09.943345Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WPlZkyHZPdcMxwv7XcrDAYC8HhbOWDWVn7Y91OEtUXg75sU8yhkHQzMcMqYb4Q+vaIMg1KCQYx7v3t+MQN5MBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:29:09.944029Z","signed_message":"canonical_sha256_bytes"},"source_id":"1501.04144","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0ed918f96362d6ae689b66e8fc3f9f9f9fb7fb9415e05662f1ef969c576ad2c3","sha256:f23ba72d61bfdb1551ad054d7621228ac4637cda543e1c5cf8b4d0ec3bfe4942"],"state_sha256":"daced488f4695905c7650cd9d7f21bd98bcd69e3eba9feb32f69cb09bfa4226a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZaXX5bEfwpoIYwCglMMDX+jpeBVZtbNGGvKh4euKAjJi4yWEOz4C2f0JNCQKUt7Qh5RuZwtYk/5U5+WdzdaDDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T20:16:02.754243Z","bundle_sha256":"c5d5eb8f0a2c10a68ff36c31954fa97832bc81c564c3bd73cec59c83b9633c16"}}